As the most affordable Haro mountain bike with disc brakes, the Flightline Two is a terrific choice for those looking to get big stopping power without a big price tag. The Flightline Two with a lightweight FL3Gi aluminum frame also boasts a new 13" frame size with lower stand over height. A new lockout suspension fork, faster rolling tires, crisp shifting and stopping on a dime equals rave reviews for the Flightline Two.